The stabilized zirconia with different Cu contents synthesized via sol- gel method. The samples were prepared by hydrolysis and condensation of orgnomatelic sol. After that the result gels were dried at 80 °C and then calcined at various temperatures.  ِ The differential thermal analysis (DTA), X-ray diffraction (XRD), field emission scanning electronic microscopy (FESEM) and transmission el...

We report conductance and thermopower measurements of metallic atomic-size contacts, namely gold and platinum, using a scanning tunneling microscope (STM) at room temperature. We find that few-atom gold contacts have an average negative thermopower, whereas platinum contacts present a positive thermopower, showing that for both metals, the sign of the thermopower in the nanoscale differs from t...

The utilisation of University teaching space is notoriously low: rooms are often unused, or only half full. We expect that one of the reasons for this is overall mismatch the sizes of rooms and the sizes events. For example, there might be an excess of large rooms. Good space planning should match the set of rooms to the set of events whilst taking account of the pedagogic requirements of the i...

obejective(s): in this research, magnetite nanoparticles with an average size of 23-36 nm were successfully synthesized via surfactant-free electrochemical method using iron as the anode and water as the electrolyte in a closed aqueous system in the presence of naoh at room temperature. methods: the effect of the current density on product formation and particle size was investigated. particle ...

Abstract It is a long-lasting task to understand heat conduction phenomena beyond Fourier. Besides the low-temperature experiments on extremely pure crystals, it has turned out recently that heterogeneous materials with macro-scale size can also show thermal effects cannot be modeled by Fourier equation. This called over-diffusive propagation, different from observations, and found in numerous ...